77563249 has 3 divisors (see below), whose sum is σ = 77572057. Its totient is φ = 77554442.

The previous prime is 77563247. The next prime is 77563259. The reversal of 77563249 is 94236577.

The square root of 77563249 is 8807.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94236577 = 857 ⋅109961.

It is not a de Polignac number, because 77563249 - 2¹ = 77563247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77563247) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4404 + ... + 13210.

Almost surely, 2^77563249 is an apocalyptic number.

77563249 is the 8807-th square number.

77563249 is the 4404-th centered octagonal number.

It is an amenable number.

77563249 is a deficient number, since it is larger than the sum of its proper divisors (8808).

77563249 is an frugal number, since it uses more digits than its factorization.

77563249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17614 (or 8807 counting only the distinct ones).

The product of its digits is 317520, while the sum is 43.

The cubic root of 77563249 is about 426.4669015883.

The spelling of 77563249 in words is "seventy-seven million, five hundred sixty-three thousand, two hundred forty-nine".